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# stop(IOProcID:)

Stops IO for the given AudioDeviceIOProcID.

```
func stop(IOProcID: AudioDeviceIOProcID? = nil) throws
```

## Parameters

`IOProcID`

The AudioDeviceIOProcID to stop. This can be nil to stop the
hardware if a call to start was made with a nil IOProcID.

---

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